JPH0333528B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tire skid device used on icy and snowy roads.

(Prior Art) As shown in Japanese Patent Publication No. 50-18648, there are two types of non-metallic anti-slip devices for automobile tires: ladder-type ones and mesh-type ones having many square meshes. A spike device is provided at the intersection.

(Problems to be Solved by the Invention) The ladder-type antiskid device described above has a drawback in that it is strong against slipping in the circumferential direction of the tire, but weak against slipping in the axial direction of the tire.

Furthermore, in the mesh-type anti-slip device, conventionally, both sides of the rectangular mesh were inclined with respect to the axial direction of the tire, so it was strong against slipping in the axial direction of the tire. It was not sufficient to prevent tires from sliding in the circumferential direction, and there were problems with traction, hill climbing performance, and braking.

Therefore, it is conceivable to make the mesh polygonal and arrange the part forming at least one side parallel to the tire axial direction, but if the mesh is made square, the circumferential part is easy to break and the axial part If the pentagonal shape is used, X portions are formed between the axial portions, resulting in portions with different braking forces in the circumferential direction of the tire, which may result in unstable braking.

Considering these points, it is best for the mesh to be hexagonal, but in order to obtain sufficient traction and braking force, as well as to facilitate installation, it is recommended to make the mesh a certain size and light in the axial direction. If the width of the part and the part that connects it are made the same width, the axial part may wear out quickly, or it may become twisted during braking and cause local wear.

In addition, the two connecting parts connected to one end in the axial direction are not parallel to the tire circumferential direction, but are inclined, so when the two connecting parts are pulled in the tire circumferential direction due to braking resistance etc. There is a possibility that cracks may occur at the connection part due to tearing.

In addition, in the conventional technology, when the spike tool touches the ground, the impact acting on the spike tool is hardly alleviated, and acts on the intersection of the mesh, causing a large gap between the intersection and the vicinity thereof. There was a problem in that the portions near the intersection were easily damaged or damaged due to the action of shearing force.

In particular, when running at high speeds, the impact acting on the spikes when they touch the ground is large, so if there are many opportunities to drive at high speeds, the anti-skids are likely to be damaged or broken early.

In the present invention, the mesh is formed into a hexagonal shape by the axial part and the dogleg-shaped connecting part, and the axial part is made wide and the connecting part is narrower than that, and a pair of connecting parts and the axial part The various problems mentioned above can be solved by making the connection parts adjacent to each other in the circumferential direction of the tire, and by providing a protruding reinforcing part that reinforces the connection part of the two connection parts on the extension of the axial part. The purpose of the present invention is to provide a tire anti-slip device that can solve the problem.

Further, the present invention provides a tire skid device in which the impact of the spike device does not have much influence on the axial portion and the connecting portion by inserting the spike device into the protruding reinforcing portion. The purpose is to

(Means for Solving the Problems) A first specific means for solving the problems of the present invention is that at least the portion of the net 7 located on the tread portion 2 of the tire 1 has a covering material 8 made of a non-metallic material. The main body portion 9 located on the tread portion 2 of the tire 1 has a large number of hexagonal meshes 11 connected to each other in the circumferential direction. The two sides are an axial part 12 parallel to the tire axial direction, and between the tire axial end parts of this axial part 12 is a dogleg-shaped part whose midway bent part 13a is stretched by a tightening cable 27. In the tire skid device having a connecting portion 13, the axial portion 12 is formed wide and the connecting portion 13 is formed narrower than the axial portion 12, and two connections are formed at the tire axial end of the axial portion 12. The ends of the portions 13 are connected adjacently in the tire circumferential direction, and a protruding reinforcing portion 14 made of a non-metallic material is used to connect and reinforce the ends of two adjacent connecting portions 13 on the outside in the axial direction of the tire in the axial direction 12.
is installed protrudingly.

In addition to the first specific means, the second specific means is that the net 7 is not located on the protruding reinforcing portion 14 and the spike tool 15 is inserted.

(Function) The axial portion 12 of the anti-slip device 6 comes into contact with the ground at regular intervals during tire rotation to generate traction force, and generates braking force during braking. The axial ends of each axial part 12 are connected by a dogleg-shaped connecting part 13, and a hexagonal mesh 11 is formed therein to catch a large amount of snow and ensure generation of traction force.

The axial portion 12 is formed wide to ensure generation of tractive force and braking force and to resist wear, and the connecting portion 13 is formed narrower than the axial portion 12, contributing to weight reduction and cost reduction. ing.

Two connecting parts 1 are provided at one end of the axial part 12.
3 are connected adjacent to each other in the tire circumferential direction, and the midway bent portion 13a of this connecting portion 13 is pulled by a tightening rope 27, and the ends of the axial portion 12 are connected in different directions in the width direction. The tensile force applied thereto prevents the axial portion 12 from twisting when the tire is mounted or from twisting during braking, and even if it is twisted, it is corrected.

A protruding reinforcing part 14 made of only non-metallic material is provided on the axial extension of the axial part 12 in the tire axial direction, and two connecting parts 13 connected to the axial part 12 are provided.
The connection is reinforced against the tearing force applied to the protruding reinforcing portion 14, and a spike 15 can be inserted into the protruding reinforcing portion 14.

When the spike device 15 is inserted into the protruding reinforcing portion 14, most of the impact acting thereon is absorbed by the protruding reinforcing portion 14 and is not propagated to the axial portion 12, the connecting portion 13, etc.

(Example) Hereinafter, an example of the present invention will be described based on the drawings of FIGS. 1 to 6.

1 is a tire, 2 is a tread portion of the tire 1, 3 is a shoulder portion of the tire 1, 4 is a rim, and 5 is a disk.

Reference numeral 6 denotes a band-shaped anti-slip device which is detachably wound around the outer peripheral surface of the tire 1 and has a net 7 as a core material.

The net 7 is made into a mesh shape by, for example, weaving synthetic fibers or natural fibers such as polyester, nylon, or rayon into a lattice weave.

A portion of the net 7 located on the tread portion 2 of the tire 1 and portions near both sides thereof are covered with a covering material 8 made of rubber.

The anti-skid device 6 consists of a main body part 9 located on the tread part 2 of the tire 1 and a pair of side parts 10 located on both sides of the tire 1.

The main body part 9 has a large number of hexagonal meshes 11 arranged in a circumferential direction, and a pair of sides forming each mesh 11 is an axial portion 12 parallel to the axial direction of the tire 1. The other two pairs of side portions forming the tire 11 form dogleg-shaped connecting portions 13 that are inclined both in the axial direction and the circumferential direction of the tire 1. The axial portions 12 of adjacent meshes 11 are shared.

That is, the wide axial portions 12 are positioned at intervals in the circumferential direction of the tire, and the respective end portions of the axial portions 12 in the tire axial direction are connected by a narrow dogleg-shaped connecting portion 13. The midway bent portion 13a of each connecting portion 13 is bent so as to be located on the outer side in the tire axial direction than the end portion.

The connection between the end of the axial part 12 and the ends of the two connecting parts 13 is such that the ends of the two connecting parts 13 are adjacent to each other in the tire circumferential direction because the axial part 12 is wider than the connecting part 13. It's coming together.

A protruding reinforcing portion 14 is provided to protrude outward from the end of the axial portion 12 in the tire axial direction. This protruding reinforcing part 14 is made by protruding the covering material 8 into a fan shape, and by connecting the ends of the two connecting parts 13, the connection and reinforcement of these parts and the axial part 12 is reinforced. The net 7 as a core material is not located, and the spike tool 15 is inserted. The tip protrusion 19 of the spike tool 15 protrudes from the surface of the protruding reinforcing portion 14.

The spike tool 15 includes a flange 17, a body 18 having a smaller diameter than the flange 17, and a protrusion 19 having a smaller diameter than the body 18.
are arranged in series in the above order in the axial direction.

The spike tool 15 is inserted into the protruding reinforcing portion 14 as follows.

That is, when putting the net 7 into the mold and covering it with the covering material 8 made of rubber, the spikes 15 are coated with adhesive and placed in the mold, thereby allowing the spikes 15 to protrude. It is inserted into the reinforcing part 14.

Thus, protruding pieces 21 are provided to protrude outward from the halfway bent parts 13a of the connecting parts 13 adjacent to each mesh 11, and the inner side of the protruding pieces 21 is made a part of the main body 9, The outer side of the projecting piece 21 is part of the side part 10. The spacing between adjacent projecting pieces 21 is the same at both the base and the tip.

Each of the protruding pieces 21, except for those at each end, is connected to one adjacent protruding piece 21 by a reinforcing part 22 at the outer side. Therefore, the reinforcement part 2
The midway bent portions 13a of the connecting portions 13 adjacent to each other in the circumferential direction of the two tires are connected, and this serves as reinforcement when the connecting portions 13 receive tensile force due to braking resistance.

The opposing parts of the reinforcing parts 22 adjacent in the tire circumferential direction are connected by an engaging part 23 of the net 7, and only the engaging part 23 of the net 7 is not covered by the covering part 8. Both ends of this engaging portion 23 are also connected to the projecting piece portion 21 and the halfway bent portion 13a.

Projecting pieces 2 at both ends of the anti-slip device 6 in the tire circumferential direction
1, connecting portions 25 each having a connecting portion 24 are formed, and each corresponding connecting portion 25 is connected to the connecting hole 24.
The slip stopper 6 is releasably connected by a connecting member 26 that is removably engaged with the stopper 6, thereby forming the anti-slip member 6 into an annular shape.

Reference numeral 27 denotes two tightening ropes, which are arranged on both sides of the tire 1. Each tightening rope 27 is connected to the engaging portion 23 of each side portion 10 with a connecting fitting 28, and the end of the tightening rope 27 The parts are also separably connected to each other by a connecting tool 29, whereby the anti-slip tool 6 is held on the tire 1.

In the non-slip device 6 having the above structure, the axial portion 12 and the connecting portion 13 on the tread portion 2 are in contact with the ground, the wide axial portion 12 mainly generates traction force and braking force, and the connecting portion 13 is connected to the axial portion. It plays the role of maintaining 12 intervals.

When the anti-slip device 6 is attached to the tire 1, or when the wide axial portion 12 is twisted or is about to twist due to resistance during braking, the ends of the narrow connecting portion 13 are adjacent to each other. Since it is connected to the axial section 12 at the axial section 12 and is pulled by the tension rope, the tire axial end of the axial section 12 receives tensile force at both ends in the width direction (tire circumferential direction), and is prevented from twisting. or straighten the torsion.

The connecting portion 13 is also subjected to a tensile force in the tire circumferential direction, and is subjected to a destructive force that causes cracks in the connection portion with the adjacent connecting portion 13 at the end of the axial portion 12.
The protruding reinforcing portion 14 increases the strength of the connecting portion between the two connecting portions 13 and prevents tearing and destruction.

Further, the reinforcing portion 22 connecting the connecting portions 13
This also prevents the connecting portion at the end of the connecting portion 13 from being destroyed.

Traction resistance, braking resistance, etc. applied to one axial portion 12 are caused by the connecting portion 1 directly connected to both ends thereof.
However, the reinforcing portion 22 and the engaging portion 23 disperse the tensile force to the other connecting portions 13 to protect the directly connected connecting portions 13.

Furthermore, since the spikes 15 are inserted into the protruding reinforcing portions 14 formed of the covering material 8 made of rubber of the main body portion 9, the impact acting on the spikes 15 when the spikes 15 touch the ground is absorbed by the protruding reinforcing portions 14 in the axial direction. It is a part that protrudes from both the part 12 and the connecting part 13 and is not subjected to tensile force during braking, etc., and the protruding reinforcing part 14 is elastically deformable, so that it is suitably relaxed and absorbed. Therefore, a large shearing force is not applied to the anti-slip device 6 due to the impact, and breakage and damage to the anti-slip device 6 can be prevented.
The anti-slip device 6 can have a long life.

In addition, if the protruding reinforcing part 14 is added as a mounting part for the spike tool 15, as shown by the imaginary line in FIG. The central part, the inclined part 13 and the protruding part 21
It may also be attached to the connection part with.

Further, the interval between the pair of protruding pieces 21 connected by the reinforcing part 22 may be inclined with respect to the circumferential direction of the tire 1 so that the distance becomes smaller toward the outer end.

In this way, when the protruding piece 21 is made in an inclined shape, when the anti-skid device 6 is attached to the tire 1 and the engaging part 23 of the net 7 is pulled by the tightening cable 27, the protruding piece 21 is reinforced. The anti-slip device 6 can be strongly pulled against the portion 22, and the anti-slip device 6 can be attached to the tire 1 more reliably.

Furthermore, although the engaging portion 23 was not covered with the covering material 8, as shown by the imaginary line in FIG.
3 may be covered with a covering material 8,
Although rubber was used as the covering material, synthetic resin or other non-metallic materials may also be used. Moreover, the reinforcement part 22
may be composed only of non-metallic materials.

The protruding reinforcing portion 14 may have a polygonal shape such as a quadrangle, a triangle, or a trapezoid other than the fan shape shown in FIG. 1.

7 to 10 show modified examples of the spike tool 15.

Seventhly, the spike device 15 is made up of a body portion 18 and a projection portion 19, and is driven into the protruding reinforcing portion 14 after the net 7 is covered with the covering material 8.

FIG. 8 shows that the spike tool 15 has a truncated conical body 1.
8 and a protrusion 19.

In FIG. 9, the protrusion 19 of the spike tool 15 is screwed into the body 18 in a detachable manner.

FIG. 10 shows that the spike tool 15 is attached to the protruding reinforcing portion 14.
A screw shaft 32 that is removably screwed into the screw shaft 32, and a pair of nuts 33 that are removably screwed onto each end of the screw shaft 32.
It is composed of.

(Effects of the Invention) According to the present invention detailed above, since the axial portion 12 is formed wide and the connecting portion 13 is formed narrower than the axial portion 12, the durability of the portion that is easily worn is improved,
We can provide a highly durable, lightweight, and low-cost anti-slip device by removing the flab in areas that are difficult to wear.
On top of that, 2
Since the ends of the two connecting parts 13 are connected adjacently in the tire circumferential direction, the axial part 12 does not twist when attached to the tire 1, and even if it tries to twist during braking, it is prevented from twisting. is corrected, uneven wear due to twisting is prevented, and durability is significantly improved.

Further, since a protruding reinforcing portion 14 made of a non-metallic material is provided protrudingly on the outside of the axial portion 12 in the tire axial direction, the two connecting portions 13 connected to the axial portion 12
It is possible to strengthen the connections at the ends of the connecting parts 13, and prevent cracks from occurring due to tearing force or the like between the connecting parts 13.
In addition, the protruding reinforcing portion 14 can insert the spike tool 15, absorbing most of the impact acting on the spike tool 15, and preventing impact from being applied to the axial portion 12, the connecting portion 13, etc. , it is possible to improve the durability of the anti-slip device when the spike device 15 is provided.

[Brief explanation of drawings]

1 to 6 show embodiments of the present invention, FIG. 1 is a plan view of the anti-skid device, FIG. 2 is a side view showing the state in which the anti-skid device is attached to a tire, and FIG. 2, FIG. 4 is a partial sectional view of FIG. 1, FIG. 5 is a sectional view of FIG. 4, taken along line B-B, and FIG.
The figure is a sectional view taken along the line CC in FIG. 1, and each of FIGS. 7 to 10 is a sectional view showing four modifications of the spike device. DESCRIPTION OF SYMBOLS 1...Tire, 2...Tread portion, 6...Slipper, 7...Net, 8...Coating material, 9...Main body part, 10...Side part, 11...Mesh, 12... Axial portion, 13...Connecting portion, 14...Protruding reinforcement portion,
15...Spike equipment.

Claims (1)

[Scope of Claims] 1. At least a portion of the net 7 located on the tread portion 2 of the tire 1 is coated with a covering material 8 made of a non-metallic material to form a mesh shape,
Main body portion 9 located on the tread portion 2 of the tire 1
A large number of hexagonal meshes 11 are arranged in a row in the circumferential direction,
Two opposing sides forming this hexagonal mesh 11 are an axial part 12 parallel to the tire axial direction, and a midway bent part 13a between each end of the axial part 12 is a tension cable 27. In the tire skid device having a dogleg-shaped connecting portion 13 that is pulled by The ends of the two connecting parts 13 are connected to the axial ends of the tire so as to be adjacent to each other in the tire circumferential direction. Protruding reinforcement part 1 made of non-metallic material in order to
A tire skid device characterized by having a protruding number 4. 2. The anti-slip device for a tire according to claim 1, characterized in that the net 7 is not located in the protruding reinforcing portion 14 and a spike device 15 is inserted therein.